Authentix, Inc.

The Royal Mint Limited

Authenix, Inc.

Jeffrey L Conroy

Philip B Forshee

Olusola O Soyemi

John-Christopher Boyer

James A Shearer

Paul John Cronin

Paul Carr

Mohamed Lazzouni

Paul A Carr

Greg R Hundt

Philip Forshee

John-Christoper Boyer

A method of increasing the accuracy of the quantification of an analyte in a hydrocarbon, the analyte containing a marking compound, by obtaining a first sample containing (a) the hydrocarbon and (b) the marking compound, obtaining a homogeneity inducing material, contacting the homogeneity inducing material with an aliquot of the first sample in a volumetric ratio of greater than or equal to about 5:1 to produce a second sample, and determining an amount of the marking compound in the second sample using an analytical technique based on the marking material.

Method of improving the accuracy when quantifying fluorescence markers in fuels

Device and methods for detecting/quantifying a fluorescent taggant in a liquid sample. Generally, the liquid samples are fuels having low concentrations (measured in ppb) of a fluorescent taggant. The detection/quantification generates a predicted concentration of the fluorescent tagging compound using a process selected from the group of a multivariate process, a background subtraction process, or a combination of both. The invention addresses the detection of an adulteration of gasoline and diesel fuels.

Determining the quantity of a taggant in a liquid sample

A composition comprising a fuel and at least one compound characterized by Formula I: wherein X is carbon, oxygen, or sulfur; Rand Reach independently are hydrogen, a Cto Calkyl, or a Cto Caryl; Rand Reach independently are hydrogen or a Cto Calkyl; Rand Reach independently are hydrogen, a Cto Calkyl, a Cto Ccycloalkyl, or a Cto Caryl; Rand Reach independently are a Cto Calkyl; Rand Reach independently are hydrogen or a Cto Calkyl; and Rand Reach independently are hydrogen or a Cto Calkyl; and wherein the compound of Formula I when subjected to GC-MS using electron ionization at greater than about 70 eV produces at least one ion having a mass-to-charge ratio of from 300 to 600.

Fuel markers and methods of producing and using same

A method of forming a composition comprising contacting a fuel and at least one compound of Formula I: wherein X is carbon, oxygen, or sulfur; Rand Reach independently are hydrogen, a Cto Calkyl, or a Cto Caryl; Rand Reach independently are hydrogen or a Cto Calkyl; Rand Reach independently are hydrogen, a Cto Calkyl, a Cto Ccycloalkyl, or a Cto Caryl; Rand Reach independently are a Cto Calkyl; Rand Reach independently are hydrogen or a Cto Calkyl; and Rand Reach independently are hydrogen or Cto Calkyl; and wherein the compound of Formula I when subjected to GC-MS using electron ionization at greater than 70 eV produces at least one ion having a mass-to-charge ratio of 300 to 600.

Formation of an authentication element by deposition of a metal layer with embedded particles on a metal substrate, wherein the embedded particles are configured to convert energy from one wavelength to another. The embedded particles may be upconverters, downconverters, or phosphorescent phosphors, which can be detected and measured with analytical equipment when deposited in the metal layer. A metal substrate may include coinage.

Metallic materials with embedded luminescent particles

At least two luminescent materials are intermingled within a security feature. The materials are selected from among a larger set of luminescent materials each having a different individual exponential decay characteristic (decay constant and initial amplitude response to the degree of excitation) for photo-luminescent emission from the respective material following excitation. The ratio of the decay constants for any two materials is greater than or equal to about 1.5. The selected materials are mixed in one of a plurality of predetermined ratios. The combined emissions from the intermingled materials appear, to an unsophisticated measuring device, to have a single exponential decay constant. Based on measurements for the decay of the combined emissions following excitation, estimates of the individual decay constants and associated initial emission amplitudes allow decoding of the particular combination of materials and/or their ratios to validate the security feature, authenticating the article.

Security aspects of multiexponential decays

A method of determining adulteration of a fuel including subjecting to an analytical technique a marked fuel mixture comprising (a) a fuel; (b) a compound characterized by Formula I: wherein X is carbon, oxygen, or sulfur; when X is O or S, R1 and R2 are lone non-bonding electron pairs; when X is C, R1 and R2 each independently are hydrogen, Cto Calkyl, or Cto Caryl; Rand Reach independently are hydrogen or Cto Calkyl; Rand Reach independently are hydrogen, Cto Calkyl, Cto Ccycloalkyl, or Cto Caryl; Rand Reach independently are Cto Calkyl; Rand Reach independently are hydrogen or Cto Calkyl; and Rand Reach independently are hydrogen or Cto Calkyl; and (c) a heavy compound, wherein the heavy compound comprises a compound of Formula I having at least one atom replaced with an isotope tag.

Marking a petroleum product includes adding a covert dye selected from the group consisting of azadipyrromethene dyes, dipyrromethene dyes, and any combination thereof to the petroleum product and distributing the dye in the petroleum product. A petroleum product selected for analysis may be spectroscopically analyzed for the presence of an azadipyrromethene dye, a dipyrromethene dye, or a combination thereof. A concentration of at least one azadipyrromethene or dipyrromethene dye present in the portion of the petroleum product may be determined to identify the petroleum product as counterfeit, adulterated, or authentic based on the determined concentration of the azadipyrromethene or dipyrromethene dye.

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Allen, TX, United States of America

Jeffrey L Conroy